Spectrophotometric determination of nickel(II) ion using the reagent (Chromazurol S)

Abstract

Chromazurol S reagent from violet complex with nickel(II) in aqueous media at
(pH=4) . The complex was found to be stable for at least 2 hour the given pH. Beers, law is
obeyed in the concentration range (3.41*10-5M-20.44*10-5M) with molar absorpitivity of
(2.178*104 L.mol-1.Cm-1) . The stoichiometry of complex was confirmed by mole ratio and
molar method which indicated the ratio of reagent to metal is (2:1) . Measuring conductivity
at room temperature the ionic character of the complex . The steadied effect of different
parameters such as effect of cations and anions , masking agent , concentration of reagent ,
effect of time , sequences of addition and effect of cationic surfactat .